Outage essentials
Plan energy for refrigeration, communication, lighting, and critical work.
Fridge runtime calculator
Calculate fridge runtime for a power station
Estimate how long a portable power station can run a refrigerator, then size clean backup power with visible assumptions.
Calculate fridge or appliance runtime before comparing products
Enter battery watt-hours and running watts here, or open the fridge example with duty cycle included.
Estimated runtime7.7 hours
Under the assumptions shown below.
- Conservative estimate
- 6.5 hours
- Usable battery energy
- 765 Wh
- Average appliance load
- 100 W
This is an estimate.
Temperature, battery condition, inverter losses, and appliance behavior affect actual runtime.
Start from the situation, not the brand
Camping and RV
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Apartment backup
Compare indoor battery options without permanent installation.
Expandable home power
Understand expansion batteries, circuits, charging, and long-outage limits.
Make the first decision with fewer assumptions
Each guide explains the calculation, the limits, and what to verify next.
Know what is verified and what is not
Manufacturer specifications, independent results, editorial calculations, and unknown values use different labels.
Read the research methodSource checked
Confirmed against a reviewed source.
Research required
The value remains unknown until it is verified.
Editorial estimate
Calculated from visible inputs and assumptions.
Research by brand
Recently reviewed
Methods and safety guidance are dated so readers can see when the page was last checked.
Recommendations should follow evidence
Affiliate relationships do not determine which products are included. Prices and availability change, and incomplete recommendations remain unpublished.